GreenJeans(tm) Chaps are designed for use by anyone who works on his/her knees (e.g., gardener, mechanic, electrician, painter). The chaps hang from the waist and go over pants and boots rather than being cinched to the legs, so the knee pads don't bind and cut off circulation when one kneels. They are made of textured nylon, which is reportedly much more abrasive-resistant than denim, with double-stitched edges reinforced at stress points. The pads are inch-thick, closed-cell polyethylene foam that's designed to be impervious to mildew/mold/bacteria and chemical/grease resistant. GreenJeans are available in four sizes, but can be custom-modified if need be.